Improvement in composition for fire-bricks



the fol owing is a'full and exact descripa net ofjnlking and using a.

I and thoroughly work to the consistency of UNITED STATES 1 ill who. it may concern:

- Be it known that we, Dav n cannon and demand State of Massachusetts, have invented new and useful Composition of Matter for the of Lining Coal-Stoves, Furnaces, Oren,- on'ndries,&c., tobe called the Soapnndf and we do hereby declare the ' '.lhe nature of our imvention consists in compounding soapstone, clay, and bornx so as to retain and radiate heat, afl'ording protection when lptlied as n lining to snrl'acescxposed h) t eat.

enable others to make and use-our insection, we will proceed to describe the manme, by weight three parts of ground soapetone and ooo'peri of clay, mixed with water,

PATENT OFFICE.

DVdD'OANNON AND HE MAN S. LUCAS, OF CHESTER, MASSACHUSETTS.

IMPROVEMENT IN OOMeOSlTION FOR FIRE-BRICKS.

Qpcciflcation forming part of Letters Patent X0. ALIOS, dated July .34, l -l7.

common mortar. it is then to be plastered or molded with a trowel or otherinstrnment into the store, furnace, or other articles which require a lining to protect them from heat. Then ict'itthoronghiy dry. Then wash the side exposed to heat with a strong solution of borer: and water.v Then heat it to the degree of rednose or higher, and it becomes hard. Tho higher it is heated the harder it becomes. It is then ready for use.

What we claim asonr invention, amLdesire to secure by Letters Patent, is-

The compounding of soapstone, clay, and born: in proportions as above described, or in similar proportions to produce the like remit.

DAVID CANNON. IIEMAN S. LUCAS. Witnesses:

Lwnmss M. R001, Josnen B. PARISH. 

